Ch5
LC-3 Instruction Set Architecture Quiz
Test your knowledge of the LC-3 Instruction Set Architecture with this engaging quiz! Dive into various questions covering memory addressing, instruction types, and more.
This quiz is designed for students and teachers who want to reinforce their understanding of computer architecture.
- Multiple-choice format
- Explore 15 challenging questions
- Score as you go!
The data type supported by the LC-3 ISA is 1's complement integers.
True
False
For an LC-3 instruction that uses the PC-Relative addressing mode, bits [15:9] of the address of the operand are the same as bits [15:9] of the address of the instruction.
True
False
The TRAP instruction changes the PC to a memory address, which is part of the operating system.
True
False
Every LC-3 operate and data-movement instruction either reads from or writes into the register file in the LC-3 datapath.
True
False
Which of the following instructions can reference a memory location that is #1000 locations from the instruction?
ADD
LD
STR
LEA
All of the above
None of the above
The addressability of LC-3 memory is
2^16 locations
16 bits
2^9 locations
2^16 bits
. For which of the following LC-3 instructions is no memory access performed during the instruction cycle?
LDR
STI
LEA
For all of the above instructions memory is accessed during the instruction cycle.
Which of the following LC-3 instructions does not access memory to fetch its operand?
LDR
LDI
LEA
All of the above instructions access memory to fetch their operands.
. The LC-3 ADD instruction:
can only add two 16-bit values found in registers
can add a 16-bit value to a zero-extended 5-bit value
can add a 16-bit value to a sign-extended 5-bit value
can add a 16-bit value to a sign-extended 10-bit value
If the value stored in R0 is 1 at the end of the execution of the following instructions, what can be inferred about R5? Address Instruction ------- ------------------------ 0x3000 0101000000100000 0x3001 0101100101100001 0x3002 0000010000000001 0x3003 0001000000100001
R5 is odd
R5 is even
R5 is equal to 0
R5 is equal to 1
____________________ change the sequence of the instructions that are executed.
Control instructions
Data Movement
Operate
All of the above.
The number of system calls that could be uniquely identified using a trapvector of 12 bits would be ________
1024
2048
4096
5120
The LC-3 operate instructions that perform binary operations are (___________________.
ADD and NOT
ADD and AND
LD and ADD
BR and ADD
If an ISA has 256 opcodes, the number of bits in the instruction encoding used to specify the opcode should be at least___.
16
32
8
4
The LEA instruction is used to write a (address) into a register
Memory
Address
Data
Counter
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